Spring.



No. 872,226. PATENTBD NOV. 26, 1907. G. T. EDGERTON & W. J. GOLDEN. SPRING.

APPLICATION FILED SEPT. 10, 1907.

3 SHEETS-SHEET 1.

' WITNESSES I INVENTOKS ATTORNEYS 3N0. 872,226. PATENTED NOV. 26, 1907. G. T. EDGERTON & W. J. GOLDEN.

SPRING.

APPLICATION FILED sum. 10, 1907.

3 SHEETBBHEBT 8.

'm'msssas INVENTDRS Toall who're it mag concern:

STATES PATENT OFFICE. I

'cHAUNonYxr. EDGERTON, OF RICHMOND HILL, AND WELFORD 'J. GOLDEN, OF OSWEGO, g v NEW-YORK. 1

SPRING.

, Be it known that we CHAUNCEY .T. Enenn- TONaIId-WELFORD J. GOLDEN, citizens of the United States of America, and residents of 5 Richmond Hill, in the county of Queens, in

i the State'of New York, and Oswe 0, in the county of Oswego, in the State of ew York, respectively, have invented certain new an'd useful Improvements in Springs, of which the I0 followingis aspecification. l This inven ion relates to springs, and-particularly tozleaf springs of both the elliptic and semi-elliptic type.

v It is well or elliptic spring gives, deflections practically proportionate to the load producing themupto thezelastic limit of the material. Now, 7 for many purposes to which such s 'ringsare applied, it would be highly 'desirab e that deflections should not bZIpro ortiOnaI to loads, Take the case of a r way car designed to carry loads which are a considerable pro ortion of the weightof the car itself. en

traveling em ty, or nearly so, certain inequalities in t e roadbed would produce o'ertain deflections in the springs under. the car.

- WithIthe samecar, traveling over thesame stretch? of -road,.heavil3 loaded, these inequalities would produce considerably-greater deflections than before, snic'e the' weight available to. produce shock, or suddenly ,"applied load, is greater. But it is generally reco 'zed that for a given class of service-the idea spring, traveling over anaverage road- 36 bed should give a certain fixed deflection to insure easy riding, irrespective of-theload carried. Manifestly the psual type of elliptic wouldnot do this; Again, take the case of an automobile traveling over a rou h coun 40 try rofldii The deflections with goo flexible springs of the usual type are excessive. The i eal .desi 11 would embody extreme flexibilityjatt e-,loaded heights of the 'sprin 1 'i. 0., under the ear bodynormally loade and a gradual stiffening in both directions as the oscillated. Thus would-be obtaine road and. over --a' rough road, where the os; cill'ations'".would otherwise be un leasantly boexoessive the stiffening up of t e 'spring would fdam'p" thevibration. I -;,'l;heobjec t,jpfthis invention is:t0 rovide alcspring which approximates the i eal de-- -sign outlined above, by separating out from I Specification of Letters Patent.

Application filed September 10. 1907. No. 892.189.

. the body of the ring one or more ofx the derstood that the usual we extreme easy riding over a smooth Patented Nov. 26, 1907.

leaves, and so ap them that they are idle under norma oad but coine'into play to prevent undesirable flexion of the spring un er light load andto reinforce it when overloaded or in case of sudden shock. Our invention differs rad ie'ally from the old aux-' iliary plate design, which itv resembles in ap eallxance only.fl d a t e accom anyin rawi Fi e 1 is a side'elevatiol i of t e usua l ielligtiii leaf spring with our improved auxiliarfi leaf in position for attachment;.Fig. 2's ows our auxiliary leaf attached' Figs. 3, 4 and 5 showdiagrammatically the sprin'gunder compression, illustrating the action of. our auxlliary leaf; Figs. 6 and 7 show modifications 'of our auxiliary leaf construction.

Referring to the drawings it will be seen that whereas in the old auxiliary plate type of leaf spri the auxiliary plates have 15 merely a slig tly less curvature than the other plates of the ring, soas to secure, their snugly against the same, our improve design contemplates auxiliaries A fitted with little or no camber and'pulled up against the back'plate B of the body of the spring Bby the band C, as shown in Figs..1j and 2. The reaction of the auxiliaries when thus pulled up' materiall tensions the main ring plates and thus re lices the free hei ht o sprmg'. It has the further effect of sti ening, throughout the range of movement, the spring from free osition, .(Fig. 2) to the osition shown in ig; 3 at which the auxi 'aries are clearof the back plates. From position Fig. 3 to position Fig. 5 the auxiliaries are idle. Somewhere within this flexiblea range the working position (Fig. 4) of the. s ring will fall. At position Fig. -5 the auxil iaries touch, and the spri becomes corres ondingly stifier. The sti ness increases as the auxiharies straighten out and roll up against the back plates, thus reducing. thelr own effective length. The total range. of

movement of the spring may thus be divided into three hases. Phase 1 includes move- 'ment from ig. 2 to Fig. 3; phase 2 from Fig.

3;to Fig. 5; and base 3 from Fig. 5 to the.- solid position. Throughout hase 2 the auxiliaries are idle, and the wor 'ng plates only carry the load. In phases 1 and 1 3 the strength of the auxiliaries is added to that of I the'working plates. The increase in strength is the more marked because the auxiliari are made. usually, though not necessarily, of, yare designed of such thicknessesto be 'sub-' heavier steel than .the working plates.

jected to maximum allowable fiber stress, when the springis in solid position. Herein our plate (llfiOIS' again from the old auxiliary plate type in which'all plates-were of the Y Obviously the peculiar characteristics of shape of 'stirrups on the hanger links, of fit- 3Y0 spring and tending by its reaction tQsub action at' di same thickness and the auxiliaries were never Worked to their capacity.

our. design ma be made; more marked by using two auxi iaries'in'each band. Either they may be of same length, one strengthening the other as'in Fig. 6, or they may be'of (llfierent len%ths and designed'to come into erent times, thus giving 5 instead of 3 phases for the movement of the spring. I A Our device may be applied to a semi-elliptic spring' of the common locomotive type by the use of proper appliances, either in the tings on the car'or carriage frame,,-or any other convenient devices which will'engage the ends of the auxiliary at the desiredpoint in its movement.

' We. claim as our invention:

1-.1Ina leaf spring, anauxiliary plate of less camber than the working plates of the stantially reduce the free height of the spring.

-2. In a leaf spring, an auxlliaryplate of less camber than the working plates of the spr1ng -wh1ch by its reaction substantially stiifens the spring under the initial range of.

load.

'wlo

'' 3'. In a leaf spring, an auxiliary spring plate i of less camber than the plates of the spring which is idle in the working position of. the

' spring but substantially afiects its action under light and overloaded conditions.

4. In a leaf'spring, an auxiliary plate of less camber than the plates of the spring and so proportioned that with the spring in solid position, said auxiliary is subjected to they maximum safe fiber stress.

' 5. In a leaf s ring, a 'lurality of auxiliary spring plates of ess cam er than the plates of 'sition of the spring but substantially a cot ng position of the spring v are idle in the working position of the spring but substantially affect its action under light and overloaded conditions.

8. In an elliptic'leaf spring, auxiliary plates of less camber -than the plates of the spring, facing each other and so shaped and proportioned that they meet and are subjected to the maximum safe fiber stress when the spring is in solid position.

I In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses.

CHAUNCEY T. EDGERTON. WELFORD GOLDEN.

Witnesses:

HERBERT W. YOUNG, S.'ELMER DELANEY 

